243245515231 has 2 divisors, whose sum is σ = 243245515232. Its totient is φ = 243245515230.

The previous prime is 243245515211. The next prime is 243245515267. The reversal of 243245515231 is 132515542342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243245515231 - 2¹³ = 243245507039 is a prime.

It is a super-2 number, since 2×243245515231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243245515211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121622757615 + 121622757616.

It is an arithmetic number, because the mean of its divisors is an integer number (121622757616).

Almost surely, 2^243245515231 is an apocalyptic number.

243245515231 is a deficient number, since it is larger than the sum of its proper divisors (1).

243245515231 is an equidigital number, since it uses as much as digits as its factorization.

243245515231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144000, while the sum is 37.

The spelling of 243245515231 in words is "two hundred forty-three billion, two hundred forty-five million, five hundred fifteen thousand, two hundred thirty-one".